从我的电脑：
cameron@cameron-ubuntu:~$ ssh [email protected]
Permission denied (publickey).
因此，手机上的 openssh 似乎没有启用密码验证。但在我看来，它应该启用。手机上的 /etc/ssh/sshd_config 是默认设置：
# Package generated configuration file
# See the sshd_config(5) manpage for details
# What ports, IPs and protocols we listen for
Port 22
# Use these options to restrict which interfaces/protocols sshd will bind to
#ListenAddress ::
#ListenAddress 0.0.0.0
Protocol 2
# HostKeys for protocol version 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes
# Lifetime and size of ephemeral version 1 server key
KeyRegenerationInterval 3600
ServerKeyBits 1024
# Logging
SyslogFacility AUTH
LogLevel INFO
# Authentication:
LoginGraceTime 120
PermitRootLogin without-password
StrictModes yes
RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile %h/.ssh/authorized_keys
# Don't read the user's ~/.rhosts and ~/.shosts files
IgnoreRhosts yes
# For this to work you will also need host keys in /etc/ssh_known_hosts
RhostsRSAAuthentication no
# similar for protocol version 2
HostbasedAuthentication no
# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
#IgnoreUserKnownHosts yes
# To enable empty passwords, change to yes (NOT RECOMMENDED)
PermitEmptyPasswords no
# Change to yes to enable challenge-response passwords (beware issues with
# some PAM modules and threads)
ChallengeResponseAuthentication no
# Change to no to disable tunnelled clear text passwords
#PasswordAuthentication yes
# Kerberos options
#KerberosAuthentication no
#KerberosGetAFSToken no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
X11Forwarding yes
X11DisplayOffset 10
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
#UseLogin no
#MaxStartups 10:30:60
#Banner /etc/issue.net
# Allow client to pass locale environment variables
AcceptEnv LANG LC_*
Subsystem sftp /usr/lib/openssh/sftp-server
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication. Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM yes
我也尝试过PasswordAuthentication yes（即取消注释，但在我看来“是”是默认的）。
此外，如果它包含一些我不知道的有用信息，ssh -v：
cameron@cameron-ubuntu:~$ ssh [email protected] -v
OpenSSH_6.6, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.99.124 [192.168.99.124] port 22.
debug1: Connection established.
debug1: identity file /home/cameron/.ssh/id_rsa type -1
debug1: identity file /home/cameron/.ssh/id_rsa-cert type -1
debug1: identity file /home/cameron/.ssh/id_dsa type -1
debug1: identity file /home/cameron/.ssh/id_dsa-cert type -1
debug1: identity file /home/cameron/.ssh/id_ecdsa type -1
debug1: identity file /home/cameron/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/cameron/.ssh/id_ed25519 type -1
debug1: identity file /home/cameron/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6p1 Ubuntu-2ubuntu1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-7
debug1: match: OpenSSH_6.6.1p1 Ubuntu-7 pat OpenSSH* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr [email protected] none
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 7f:25:18:85:69:9f:9f:f2:25:e8:93:93:c1:50:56:c6
debug1: Host '192.168.99.124' is known and matches the ECDSA host key.
debug1: Found key in /home/cameron/.ssh/known_hosts:16
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/cameron/.ssh/id_rsa
debug1: Trying private key: /home/cameron/.ssh/id_dsa
debug1: Trying private key: /home/cameron/.ssh/id_ecdsa
debug1: Trying private key: /home/cameron/.ssh/id_ed25519
debug1: No more authentication methods to try.
Permission denied (publickey).
答案1
手机上的 SSH 守护程序使用以下选项运行
/usr/sbin/sshd -D -o PasswordAuthentication=no
它将覆盖配置文件中的任何选项。更改这一点可能很困难。
在这种情况下，设置公钥认证可能更容易（也更安全）。将您的公钥粘贴到/home/phablet/.ssh/authorized_keys2。是的，末尾有一个 2，这让我觉得它/etc/ssh/sshd_config根本没用。
您只需要一种初始登录手机的方法。尝试使用adb shell或 Ubuntu SDK 中的 Qt Creator 按钮来启用开发者模式、设置公钥身份验证等。
答案2
/etc/init/ssh.override 是覆盖默认 ssh 选项的地方。
cat /etc/init/ssh.override
manual
exec /usr/sbin/sshd -D -o PasswordAuthentication=no
因此您可以从这里将其删除。
答案3
在手机上安装终端应用。切换到开发者模式（在设置/关于设备中）并设置密码（不是 PIN）。运行终端并输入此命令
/usr/sbin/sshd
现在，你可以使用 ssh 从你的计算机连接到该设备（例如）
远程控制[电子邮件保护]
使用切换到开发者模式时输入的密码。IP 地址当然需要是您手机的 IP。如果您不知道，只需在手机终端中运行 ifconfig 命令并在 wlan 接口附近查找 IP。
如果您想下次更轻松，请通过以下方式将密钥从计算机复制到手机：
ssh-复制-id[电子邮件保护]
下次您就不需要密码了，甚至可以禁用开发人员模式。您仍然需要运行 ssh 服务器，这次使用命令
sudo /etc/init.d/sshd 重启